Prior to the development of radiocarbon dating, it was difficult to tell when an archaeological artifact came from.
It is literally able to count carbon-14 atoms one at a time.3 This machine can theoretically detect one radioactive carbon-14 atom in 100 quadrillion regular carbon-12 atoms! AMS instruments need to be checked occasionally, to make sure they aren’t also “reading” any laboratory contamination, called background.
An excellent answer can be read at: The simple fact is - it doesn't.
So many inaccuracies with radiocarbon dating have been discovered that it is a wonder they still use it.
So if fossils are really millions of years old, as evolutionary scientists claim, no carbon-14 atoms would be left in them.
Indeed, if all the atoms making up the entire earth were radiocarbon, then after only 1 million years absolutely no carbon-14 atoms should be left!